Total War: Warhammer came out this year and it was commercial and critical success. Many said it's their favorite in the series. The game has re-energized the franchise with no doubt and having a fantasy based trilogy is a good change for the series primarily known for history based titles.
Shogun: Total War (Expansion: Mongol Invasion)
Medieval: Total War (Expansion: Viking Invasion)
Rome: Total War (Expansion: Barbarian Invasion, Alexander)
Medieval 2: Total War (Expansion: Kingdoms)
Empire: Total War (Expansion: The Warpath Campaign)
Napoleon: Total War (Expansion: The Peninsular Campaign)
Total War: Shogun 2 (Expansion: Rise of the Samurai, Fall of the Samurai)
Total War: Rome 2 (Expansion: Caesar in Gaul, Hannibal at the Gates, Imperator, Augustus, Wrath of Sparta)
Total War: Attila (Expansion: The Age of Roman, The Age of Charlemagne)
Total War: Warhammer (Expansion: The Beastmen, The Warriors of Chaos, The Grim and the Grave, The King and the Warlord)
So which one is your favorite (including expansions)? And tell us why. I think my favorite is still Medieval 2: Total War. Something about that time period just makes it my favorite even though technically newer games like Shogun 2 are superior (Better graphics, better AI, Better controls, Streamlined UI etc). So much great stuff happened in that time period that interests me; Mongol invasion, Rise of the Ottoman Empire, Crusades, Rise of Black Powder, Knights of the Templar, Cult of Hashashins and so on.